Physics – High Energy Physics – High Energy Physics - Experiment
Scientific paper
2002-11-04
Physics
High Energy Physics
High Energy Physics - Experiment
5 pages, LaTex, 9 EPS figures. Talk given by R.Fabbri at SPIN 2002, BNL. References modified
Scientific paper
10.1063/1.1607150
Exclusive electroproduction of $\pi^+\pi^-$ pairs off hydrogen and deuterium targets has been studied with the HERMES experiment. The angular distribution of the $\pi^+$ in the $\pi^+\pi^-$ rest system has been studied in the invariant mass range $0.3 < m_{\pi\pi} <1.5$ GeV. Theoretical models derived in the framework of the Generalized Parton Distributions show that this angular distribution receives only contributions from the interference between the isoscalar channel I=0 and the isovector channel I=1.
di Nezza P.
Fabbri Renato
for the HERMES Collaboration
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